Trolley-wheel.



J. W. PENNEL'L.

TROLLEY WHEEL. APPLICATION FILED AUG. 24, 1910.

Patented Sept. 24, 1912.

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U ITED STATES PATENT OFFICE.

JOHN W. PENNELL, 0F YOUNGSTOWN, OHIO.

TBOLLEY-WHEEL.

Specification of Letters Patent. Application filed August 24, 1910. Serial No. 578,614.

V This invention relates to trolley wheels and the principal object thereof is to provide a device which will return the wire to the wheel when it sli s off. It is also desired to prevent any anger of the wire becoming ammed between the outside wheels and the central wheel.

This improved wheel" is illustrated in the accompanying drawings, wherein- Figure 1 is 'a View showing the normal position of the three wheels. Fig. 2 is a view showing one of the side wheels in a position to return the tr lley wire to the central wheel. Fig. 3 is; view of one of the side wheels removed frpm the axle.

In the accompanying drawings, 1 indicates the harp of the trolley pole which is provided with the usual arms 2 and 3 in the ends of which is mounted an axle 4. A central grooved wheel 5 and side wheels 6' and 7 are mbunted u on the axle 4. The central wheel is provi ed with an opening passing through the center while the wheels 6 and 7 are each provided with an opening 8 which is ofl the center, as shown in Fig. 3, for a pm ose to be brought out hereina ter.

Each 0? the side wheels is provided with a groove 9 which is provided at its inner edge with an abutment wall 10. The groove gradually decreases in depth until it terminates in an outwardly curved portion 11, the inner edge of which is level with the edge of the wheel 5. The wheels are held' spaced apart from the sides of the harp Patented S ept. 24, 1912.

by means of the washers 12 and 13, and the axle is held in place by the nut 14.

The operation of the device is as follows: In 0 eration the wire 15 is normally held within the groove of the wheel 5; if by acci dent said wire should get out of the groove, it will fall within the groove of one of the wheels 9 which in normal position is uppermost. By having the wall 10 there is no danger of the wire being jammed between F the side of the wheel 5 and the side wheel. When the wire gets into groove 9, it causes the wheel to turn until it assumes the position shown in Fig. 2. In this osition, the wire can easily roll back into t e groove-of the central wheel 5, and there is no danger of its becoming jammed. When the wlre goes back onto the wheel 5, the weight of the enlarged portion 11 and the fact that the wheel is mounted 011' the center causes it to return to the original position shown in Fig. 1.

What I claim as my invention is:

The combination withpa trolle wheel of a replacing wheel on each si e thereof,

trolley wheel, each being mounted'eccen- ,trically on the axis, each of said replacing wheels having a peripheral groove extend- 'ing from the median line at the short side.

thereof and merging at the longer side into the face adjacent the trolley wheel, at a point flush with the peripheryof the latter.-

In testimony whereof I hereunto aflix my signature in presence of two wltnesses.

JOHN W. PENNELL.

Witnesses B. K. DE CAMP, J. P. DE CAMP. 

